Titanic is a four-part television serial and period drama written by Julian Fellowes. It is based on the passenger liner RMS Titanic, which sank in the North Atlantic Ocean in April 1912 following a collision with an iceberg on her maiden voyage from Southampton to New York City.

The series was created by producer Nigel Stafford-Clark and written by Julian Fellowes to mark the 100th anniversary of the maritime disaster on 15 April 1912. It sets out to paint a portrait of a whole society, telling the stories of a wide range of characters, both real and imagined, from every social level. Their narratives are developed and gradually interwoven over the first three episodes, each of which ends in a cliffhanger as the ship begins to founder. The fourth and final episode draws all of the different stories together and reveals to the audience who survives.

Titanic was released in March and April 2012 for the disaster's centenary on 15 April 2012. It was one of two such productions to mark the anniversary; the other was Titanic: Blood and Steel.